For a concise but accurate description of the Hindu religion, look here.
For even more information, a good place to start is Spirituality, Yoga, and Hinduism, which goes into much more details and answers more questions than I ever could on the Hinduism page.

Again, I can't emphasize enough that Hinduism is a large and diverse religion that has evolved through centuries. There is no exclusive text or founder. There is no one right way of thought. Please don't assume that all Hindus will necessarily hold the same beliefs.